Type-writing machine.



No. 880,858. EATENTEE JUNE`y 9, 1908.5 W. E. HELMOND.

TY-EE WRITING MACHINE.

APPLIGATION FILED 0GT.21,1907.

' UNITED sTATEs PATENT OFFICE WILLIAM F. HELMOND, OF HARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

y o. 890,368. Specication of Letters Patent. Patented June 9, '1908 Application med october 2,1, 1907. serial Np. eaoe.

To all whom 'it may concern: also' xed upon the rod 4 guide the yok'es 9, Be it known that I, WILLIAM F. HELMOND, and serve as bearings for the rock-shaft 15. a citizen of the United States, residing in The springs 19, 2O normally exert u'pA aij'd Hartford, in the county of Hartford and pressure on the okes 9, and ress the ro 5, State ofCo'nnecticut, have invented certain 6 against the p aten. At this time `the Vends go new and useful Improvements in Type-Writ-I or tips21 of the springs are out of ehfgag-I# ing Machines, of which the following is a ment with the cam portion 16 of sha t 15. 1 specification. By depressing the release key 18 to the Fig. '3 f This invention relates to paper feeding and position, the link A17 is caused 'to pull up `a' "1a guiding devices of typewriting machines, and` crank 25 provided upon therock-sh'aft 15,

B particularly to means for controlling the *and rocks the latter, which cams down the` 1% pressure rolls that run upon the usual cylinsprings 19, 2O and locks them out of engage- V drioal platen. ment with the yokes 9. The latter 'drop and The object of the invention is to provide release the rolls from the platen.- The oper-ff` simplified, inexpensive and effective means ator may now readily adjust the 1FJpla'per, and ifo for feeding and guidin the paper around the after Vsuch adjustment raise the ger pi'eee platen, and also for ho ding the paper firmly 18, the'rebv unlocking the springs and restora ,g;ainst`tl1e platen; also to means for releasin the vrolls to normal condition, Fig. 4. ing'the rolls andholding them released or aving thus described my inventiom 1 locked away from the platen during the nclaim: V troduction and adjustment of the paper LInaty-pewriting machine, the ,combina-H i, sheets. c I tfon witharevoluble platen and pressure rolls. i

In the acoompan ing drawings,- Figure'l is running thereon and divided into front and- *n a'front view of a platen frame of an Under- 'rear sets, each set having an axle, of a yoke.` wood front strike'writingmachine. Fig. 2 is guided upon the platen frame for movement *13 va perspective view illustrating the mounting towards and away from the platen, and hav-` ofthe rolls and the releasable means therefor. in open slots to engage said 'axles to guide Fig. 8 is an end view of the paper feeding and al of said rollers, and releasable means for guiding devices, showing the pressure rolls .pressing the rollers against the Cplaten,` said Y released and looked away from the platen.` axles being -detachable from sai yoke. Fig. 4 is a view` similar to Fig. 3, but showing 2. In a typewriting machine, the vcombinathe releasable means in normal position. tion With a revoluble platen and pressure rolls 40 rolls 5, 6 are carried upon shafts 7,' 8, said ers, and releasable means for' pressingthe f In machines of the class referred to theV running thereon and divided into front and types usually strike upon the front side of the rear sets, each set having an axle, of yokes 35 platen 1, which is revolubly mounted by having 'slots to engage rods extendin' along 901 means of an axle 2 in the ends 3 of a platen said platen frame, to guide the yoes for frame. Arod `4 is ri idly fixed in the platenmovement towards. and away from the. l frame ends and lies elow and parallel with platen, said yokes having means to enga vre theplaten. Sets of front and rear pressure said axles to press and guide all o f said ro 96 shafts resting in cradles or yokes 9. Each of yokes towardsthe platen. l

the latter has a U-shaped yoke. portion and 3. In a typewriting machine, the combinaarms 10, 11 extending forwardly and reartion with a laten and a plurality of pressure wardly therefrom, said arms having open rollers, of a ey-operated rooleshaft provided bearings 1.2, 13, to receive said roll-shafts and with a cam, a spring, and means for enabling 100 permit detachment thereof. Hangers Vor said spring to press said rollers against the caring-blocks 14 are secured to the rod 4, yin platen said spring having a part to e age which is journaled a rock-shaft 15, having said cam tobe depressed thereby to ro ler# cams 16 formed thereon. The rock-shaft is releasing position. f connected by means of a link 17 to a key 18 4. In atypewriting machine,- the combina- 10t pivoted upon the platen frame. Springs 19, Ation with a platen and a set of pressure roll- 20 secured to the hangers 14 ext lnd inwardly ers, of a key-operated rockshaft extending from the end ofthe platen, and are bent up at along the platen and provided with cams, 1 their free ends, as at ,21, to enga e cam por.- springfingers vmounted upon the, laten tions 16 on the rock-shaft 15. Co lars 22, 23,- frame and extending along the platenigtli l against t e ends of said l upon which said rollers are mounted, yokes rollers against the platen, and a key-'operated rollers.

` with a platen and a laten frame, the combination with a pair o shafts and a set 'of rollshaft.

fers, of spring platen frame and .yokes havin againstthe p aten, andmeans for throwing -upon which said rollers are mounted, a luarms in which the roller'- said ingers being engageable by said, l and. devicesv actuated 'by said springs to ress the'rollsl a ainst the platen; said springs being relealsa le by the action of'said cams thereon during the4 rocking of said tiaps of cams,

5. In a typewriting machine, the'combination with a platen and a set of pressure'y rollfingers mounted upon the extending along the platen, yokes engageable by said spring fingers and extendin to the rollers to press the latter laten, tips provided upon the ngers, the latterl extending past said yokes, and a key-o ierated shaft extending along the platen an provide-d with Acams to engage said tips to release said springs an lock them in Aineffective positions. p

6. In a typewriting machine, the combina-4 tion with a platen frame and a platen, of two sets of rollers running upon the platen, two shafts upon which said rollers are mounted, oppositely-extending arms in which said s afts 'are journaled, a spring engaging each oke and pressing the rollers and locking the springs out of engagement with the yokes. y 7. In a typewritin machine, the combination with a platen rame and a platen, of rollers running upon the platen and shafts having oppositely-extending arms in which the roller shafts are journaled, springs engaging with the yokes and pressin the rollers against the platen, and a rock-s aft having means to throw the springs out of engagement-with the yokes. n

'8. In a typewriting machine, the combina-` 'tion with a platen frame and a platen, of sets of rollers running `upon the platen, shafts rality ofyokes having oplpositely-exten ing afts are journaled, springs ven, ;aging nthe yokes and pressing the rock-shaft havingpcarns thereon to throw and lock said springs out of engagement with the yokes.

9. -In a typewriting machine provided with a platen. and a platen frame, the combination of -two sets of rollers running upon the platen, two shafts u on which 'said rollers are mounted, a lura ity ofy'okes having olppositely-dispose arms in which the rollers afts are journaled, springs engaging the yokes to press the rollers against the platen, and a rock-shaft having cams thereon connected with a key and operable to throw said springs out of engagement with the yokes and thereby releasing the pressure on the 10. In a typewriting machine provided gaging said nation with a ers mounted upon each shaft, of a rodlying between said roller-shafts and having a bearing block-at each end, a rock-shaft mounted in said blocks and connected to a lever, cams\ on'said rock-shaft, a plurality of yokes'having op ositely-disposed arms in which the roller-s afts are journaled, and springs enshafts and rollers'against the platen, said springs being'rnovab e by thecams on the rock-shaftnto release the pressurel on the rollers. A

' f 11. In a typewriting machine,'the combilaten anda platen frame, of two sets of ro ers runnin upon the platen, shafts upon which said ro lers vare mounted, a rod mounted in the ends of the platen frame and lying between the' roller-shafts, a rock-shaft having a' cam Vthereon journaled in hangers secured to the rod, a lever connected to said rock-shaft, a yoke bestriding the rock-shaft and having oplpositely-extending arms in which the roller s afts are journaled, a leafspring at one end secured to one of thev hangers and normally bearing with its :free end against the yoke; said free endof the spring also being engaged by the cam on the rotk-shaft to release thev pressure' on the o e. 12. In a typewriting machine, theI combination with a laten and a platen frame, of

two setsv of ro ers, shafts upouwhich said rollers are mounted, a roc -shaft having cams thereon andconnected to a lever, okes in which the roller-shafts are jo'urnale and a leaf spring normally pressin against each yoke, said spring being movab e by a cam on,

yokes'and pressing the rollerthe rock-shaft to'release the pressure on the 13, In atypewriting machine` provided with a platen and a platen frame, the combination with 'a pair of shaftsland a set of rollers mounted u on each shaft, of a rod mounted in the p aten-frame ends so as to lie between said roller-shafts, a pair of bearling blocks or hangers mounted on said rod, a rock-shaft journaled in said blocks and having a link and lever connection, cams on said rock-shaft, a lur'ality of yokes bestriding said rock-sha t and having o positely-extending arms in which the rol er-shafts are `journaled, and leaf springs secured to the vunderside of each of said blocks and bearing against said yokes and thereby pressing the rollers against the platen, said springs being movable bythe cams on the rock-shaft to lock said springs out of engagement with,

and to release the pressure on, the yokes..

14. In a typewriting machine provided with a platen and a platen frame, the combination with two sets of rollers running upon the platen, and shafts upon which said rollers are mounted, of a rod mounted in the ends` of the platen frame and lying between the roller-shafts, a rock-,shaft having cams thereon journaled in hangers secured (to the rod, a lever connected to said rook-shaft, yokes bestriding the mob-shaft and having o positely-extending arms in which the roller s afts` are journel'ed, and a pair of springs one seeurecl to euch of the hangers at one end and its other end engaging a cam on the rookthe platen, shafts upon which said rollers are mounted, and a rod mounted in the ends of the platen frame and lying between the roller shafts, of a roek-shaftlhaving cams thereon f journaled in hangers secured to the rod, a lever connected to said rock-shafts, yokes bestriding the rock-shaft and having op ositel rextending arms in which the roller s afts are journaled, and alpair of s rings7 .each spring connected at one of its en s to the under side of one of the hangers and the free ends of the springs bent up at a substantiall l and engaging cams on the roclshaft, said springs normally bearing a ainst the yokes and thereby pressing the ro ers against the platen, and movable by the earns on the rock-shaft to lock the same in rollerreleasing positions.

WILLIAM F, HELMGND. `Witnesses: v

W. M. BYORKMAN, MoRToN C. TALCOTT.

right angle 

